Sibberi is a company which sells birch water, maple water and bamboo water at £2.50 for a small bottle.

Its website says that maple water is “naturally hydrating, packed with Manganese and is good for bones and tissues”. Meanwhile, its birch water is “naturally hydrating, naturally detoxing and good for joints” because it “helps expel uric acid”.

Sibberi told The Sunday Times that it did not make claims for its products but shared information based on research, general knowledge and historical use.